Annoyed with Glow

Ok so I've been logging evyday for the past three weeks. According to Glow my ovulation day was the 25th my husband & I had intercourse on the 24th, 25th & 26th the three days were it showed the highest chance of pregnancy. I kept logging on Glow everyday & after logging today it changed my peaks days to be Friday, Saturday & today. Ok two of those days already past & Saturday was the best day for intercouse. I still have Sunday but my husband is working the night shift so I guess I now lost my opportunity for this month. I'm disappointed with this app I was starting to feel comfortable with it until it changed everything on me.